Increase or Decrease the Size of Static Partition in Linux.

To increase the size of static partition:

Step1: Create a partition (say of 2Gb)

Step2: Format(ext4) it and mount a folder (say lw) to it

Step3: Create file and store in that partition.

Step4: Unmount folder

Step5: Delete the created partition and save the settings

 Step6: Create new partition of size bigger than that of previous one(say 4Gb)

Step7: Now use “e2fsck -f /dev/sdb1”

This command checks the filesystem(ext2,ext,3,ext4), if error is there like OS shutdown abruptly then, our inode table might have some garbage/bad block. hence this command will remove all of them. 

Step8: Now use “resize2fs /dev/sdb1”

This command format(create filesystem like ext4) the remaining volume added to the partition i.e. 4-2=2.

Step9: Now mount the previously mounted folder i.e. lw.

We will see that our previously created file and its data is present in it!!!

To decrease the size of static partition:

Step1: Create a partition (say of 4Gb)

Step2: Format(ext4) it and mount a folder (say aaa) to it

Step3: Create file and store in that partition.

Step4: Unmount folder

Step5: use "e2fsck -f " on partition(eg. e2fsck -f /dev/sdb1)

this command will basically clear all the garbage/bad blocks from inode table

Step6: use "resize2fs" command to reformat the partition with new size(say 2Gb) and not loosing the data. Basically we are just updating the inode table (eg. resize2fs /dev/sdb1 2G)

Step7: again mount the partition

We will see our data is not lost!!!